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Abstract In August 2021, Kevin Bock and his team from the University of Maryland and the University of Colorado Boulder proposed a new TCP reflective amplification attack method initiated by the middlebox at the USENIX conference. (See more details at https://geneva.cs.umd.edu/papers/usenix-weaponizing-ddos.pdf) In mid-April this year, NSFOCUS spotted that one of its Cloud DDoS Protection Service […]

Incident discovered In early 2021, a private cloud service provider in the United States was hit by a massive hybrid SYN Flood attack. As the service provider is a customer of NSFOCUS Cloud DDoS Protection Service and subscribed with Managed Security Service (MSS), the malicious traffic is noticed instantly by NSFOCUS Managed Security Service team, […]

Overview Recently, NSFOCUS CERT found that OpenSSL issued a security notice, which fixed multiple security vulnerabilities in OpenSSL products. OpenSSL is an open source software library package. Applications can use this package to communicate securely, avoid eavesdropping, and confirm the identity of the other end of the connection. It is widely used on web servers […]

Incident Response On mid-2021, a multinational telecom service provider was attacked by a sudden large-scale DDoS attack with the peak value of 170Gbps with maximum 5Gbps of malicious traffic leakage, with equivalent Mitigation Effect (mitigated malicious traffic/total ingress traffic) stays at least 97%. The service provider did not encounter service interruption during the whole incident. […]

Overview Recently, NSFOCUS CERT detected that F5 issued a security bulletin to fix an authentication bypass vulnerability in BIG-IP. Unauthenticated attackers can use the control interface to exploit, through the BIG-IP management interface or its own IP address. Network access to the iControl REST interface to execute arbitrary system commands, create or delete files, and […]

Debut of CASB With cloud computing being a key to industry revolution, more and more enterprises and organizations are discovering the benefits of storing and processing data in the cloud and migrating business systems from local data centers to the cloud. As business systems are migrated to the cloud, the security responsibility of enterprises has […]

Last time we talked about the powerful features and rich usage scenarios of SD-WAN (SASE Popular Science Series: Understanding SD-WAN), what about the relationship between such a powerful SD-WAN and NSFOCUS SASE? This starts with the challenges faced by enterprises today…… Current Problems Faced by Enterprises Single node deployment security capacities, causing network congestion With […]

In mid-April, NSFOCUS discovered that one of its Cloud DDoS Protection Service customer in APAC region has encountered a TCP-middlebox-reflection attack which became popular throughout the world during past months after its first discourse in Aug, 2021. The attack reached its peak at 7Gbps and lasted for several hours, after immediate reaction by NSFOCUS Managed […]

Overview On April 20, 2022, NSFOCUS’s CERT monitoring found that Oracle officially released the April Critical Patch Update announcement CPU (Critical Patch Update). A total of 520 vulnerabilities of varying degrees were fixed. This security update involves Oracle WebLogic Server. , Oracle MySQL, Oracle Java SE, Oracle FusionMiddleware, Oracle Retail Applications and many other common […]

Overview On April 13, 2022, NSFOCUS CERT detected that Struts officially issued a security notice and fixed a remote code execution vulnerability S2-062 (CVE-2021-31805). This vulnerability is not fully repaired for S2-061. When developers use the %{…} syntax to force OGNL parsing, there are still some special TAG attributes that can be parsed twice; attackers […]